Doric Instruments 5000D Digital Process Indicator and Miniature Datalogger - Manual (Page 26)

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NOTE: Display readings take up to 10 seconds to
respond to changes in the zero and span pots.
STEP 4.
Adjust the voltage source output to 39.000 mV.
Adjust the SPAN potentiometer RV203 for a display reading
of 560.0 ±0.1. Press PGM to exit the calibration mode. Turn
the indicator power OFF.
NOTE: The reference junction adjustment is factory
set. However if after performing the zero and span
calibration the unit is not accurate within factory
specifications, an adjustment of the reference
junction may be necessary.
STEP 5. Reference Junction Adjust
With the power
turned OFF, remove the copper wires from the +V and -V
input connections and connect a thermocouple simulator with
K thermocouple wire, connect the negative lead (red) to
terminal 2 and the positive lead to terminal 3.
STEP 6. Turn power on and allow several minutes warm
up. Program the indicator for K thermocouple type,
°
F (see
Chap.3 Sensor Setup). Adjust the input source for an output
of 32.0
°
F and adjust RV202 for a display reading of 32.0
°
F.
Allow at least 15 seconds between adjustments. This
completes the thermocouple type calibration procedure.